1 files changed, 2 insertions, 2 deletions

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 9372f0406ad4..6c99f5037801 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -1192,7 +1192,7 @@ out:
         return 0;
 }
 
-struct notifier_block device_nb = {
+static struct notifier_block device_nb = {
         .notifier_call = device_change_notifier,
 };
 
@@ -1763,7 +1763,7 @@ static void *alloc_coherent(struct device *dev, size_t size,
         flag |= __GFP_ZERO;
         virt_addr = (void *)__get_free_pages(flag, get_order(size));
         if (!virt_addr)
-                return 0;
+                return NULL;
 
         paddr = virt_to_phys(virt_addr);